Suction cup



pt. 27, 1938; C, KAACK 2,331,224

sUcTIoN CUP Filed Aug. 25, 1937 Patented sept. 27, 193s `UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to a suction cup of the type adapted to be pressed against a smooth surface and to be maintained in place by a partial vacuum.

An object of the invention is the provision of an improved construction whereby the attaching of the device is facilitated and the attaching peripheral surface is not distorted during the attaching or amxing operation.

. A further object is the provision of an improved support for maintaining an article in an upright or horizontal position.

In the drawing wherein is illustrated a preferred embodiment of the invention:

Fig. 1 is a. side elevational view of the complete device;

Fig. 2 is a vertical sectional view taken on the line 2-2 of Fig. 1;

Fig. 3 is an enlarged vertical sectional view taken on the line 3--3 of Fig. 2.

As illustrated, the preferred embodiment of l the invention comprises a suction cup 9 of resilient material such as rubber, having a iiat peripheral surface I adapted to be pressed against a, second at surface to which the device is to be attached.

The outer surface of the cup device is preferably constructed of a plurality of concentrically arranged corrugations or steps II, I2 and I3, and the inner surface likewise is provided with a corresponding plurality of corrugations I4 and I5.

.By this construction and arrangement, when the device is attached to a surface and the air expelled by pressure, the corrugations or corru gated portions are progressively pressed, inward. Thus, portion ii will be pressed inward a short distance before pressure is exerted on portion I2,

and finally portion I3 is depressed. In this man- .t

ner surface I0 is not distorted or dislodged during the attaching operation, and a more uniform vacuum action results. The corrugations I4 and I5 on the inner surface facilitate the progressive movement of the stepped portions.

The device is adapted to support any suitable article such'as a rack I6 and to assist in maintaining the article in proper position, an auxiliary spring arm I1 is preferably provided. In

the form shown in Figs. 1, 2 and 3, the spring arm I1 is held in place by a'stud I8, having an enlarged head I9 embedded in the central portion of the cup. The primary object of this arm I1 is to oifer relief to the suction cup, and pre- 5 vent the vacuum being broken by the weight of the article supported thereon. Two spring forked members 20, 2I, may be provided to receive a member 22 of the'article to be supported. In' this instance it is desirable to have the article tov-be supported made of square section, preferably at the point of its support by the holder.

I claim:

1. A device of the character described, comprising a resilient cup member having a corrugated outer surface, a corrugated inner surface corresponding conguratively with said corrugated outer surface adapted to nest under pressure applied at the apex of said cup member, thus providingseveral independently gripping vacua, a supporting stud securely anchored to the apex of the outer surface of the said cup member, and an auxiliary supporting arm securely fastened to said supporting stud, and having one end terminating in two flexible receiving 25 lips, forming a socketed portion adapted to receive an article to be supported and having itsl other end resting on the outer flange of said cupmember.

2. A device of the character described, comprising a corrugated outer surface, a corrugated inner surface corresponding conguratively with said corrugated outer surface, and having at least three serrations or corrugations adapted to nest under pressure applied at the apex of said cup member, thus providing several independently gripping vacua, asupporting stud securely anchored tothe apex of the outer surface of the said cup member, and an auxiliary supporting arm securely fastened to said supporting stud, and having one end terminating in two flexible receiving lips, forming a. socketed portion adapted to receive an article to be supported and having its other end resting on the outer flange of said cup member.

CARL KAACK. 

